package  {
    import flash.display.*;
    import flash.events.*;

        public class Learning extends MovieClip {
            public var mc1:MovieClip = new MovieClip();

            public function Learning() {
                mc1.graphics.lineStyle(3);
                mc1.graphics.beginFill(0xff0000);
                mc1.graphics.drawCircle(200,200,50);
                mc1.addEventListener(KeyboardEvent.KEY_DOWN, enterFrame_handler);
                this.addChild(mc1);
                mc1.graphics.endFill();
            }

            private function enterFrame_handler(e:Event):void{
                if(e.keyCode == 32) {
                    mc1.alpha = mc1.alpha - 0.05;
                }
            }
        }

}